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discussed in biography

...novelist Romain Rolland, Freud came to acknowledge a more intractable source of religious sentiment. The opening section of his next speculative tract,
Das Unbehagen in der Kultur (1930;
Civilization and Its Discontents), was devoted to what Rolland had dubbed the oceanic feeling. Freud described it as a sense of indissoluble oneness with the universe, which mystics in particular...

instinct

...This view is derived from German poet Friedrich von Schiller’s expression that “hunger and love are what moves the world,” a concept that prevailed in Freud’s
Civilization and Its Discontents (1930). However, in 1915 Freud published a paper titled “
Instincts and Their Vicissitudes,” which ultimately served as an account of...